TreeItem:expand( [expanding] ) method
Expands or collapses the subitems associated with the TreeItem.
[expanding]
An optional boolean value indicating if the item should expand (true) or collapse (false).
If omitted, the TreeItem will toggle and collapse if it is already expanded, or expand if it is collapsed.
Return value
This function returns no value.Example
local ui = require "ui"
local win = ui.Window("TreeItem:expand() sample", 320, 220)
local tree = ui.Tree(win, {Item1 = {"SubItemA", "SubItemB", "SubItemC"}, "Item2", "Item3"}, 60, 40, 200, 160)
local button = ui.Button(win, "Expand/Collapse subitems", 86, 10)
function button:onClick()
tree.selected:expand()
end
win:show()
while win.visible do
ui.update()
button.enabled = tree.selected ~= nil and tree.selected.count > 0
end